[apple/xnu.git] / bsd / ppc / param.h

/*
 * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1993,1995 NeXT Computer, Inc. All Rights Reserved */
/*
 * The NEXTSTEP Software License Agreement specifies the terms
 * and conditions for redistribution.
 *
 */

#ifndef	_PPC_PARAM_H_
#define	_PPC_PARAM_H_

/*
 * Round p (pointer or byte index) up to a correctly-aligned value for all
 * data types (int, long, ...).   The result is u_int and must be cast to
 * any desired pointer type.
 */
#define	ALIGNBYTES	3
#define	ALIGN(p)	(((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)

#define	NBPG		4096		/* bytes/page */
#define	PGOFSET		(NBPG-1)	/* byte offset into page */
#define	PGSHIFT		12		/* LOG2(NBPG) */

#define NBSEG		0x40000000	/* bytes/segment (quadrant) */
#define	SEGOFSET	(NBSEG-1)	/* byte offset into segment */
#define	SEGSHIFT	30		/* LOG2(NBSEG) */

#define	DEV_BSIZE	512
#define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
#define BLKDEV_IOSIZE	2048
#define	MAXPHYS		(128 * 1024)	/* max raw I/O transfer size */

#define	STACK_GROWTH_UP	0		/* stack grows to lower addresses */

#define	CLSIZE		1
#define	CLSIZELOG2	0

#define STACKSIZE 4			/* pages in kernel stack */
#define	UPAGES	0	/* total pages in u-area */
					/* red zone is beyond this */

/*
 * Constants related to network buffer management.
 * MCLBYTES must be no larger than CLBYTES (the software page size), and,
 * on machines that exchange pages of input or output buffers with mbuf
 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
 * of the hardware page size.
 */
#define	MSIZE		256		/* size of an mbuf */
#define	MCLBYTES	2048		/* large enough for ether MTU */
#define	MCLSHIFT	11
#define	MCLOFSET	(MCLBYTES - 1)
#ifndef NMBCLUSTERS
#if GATEWAY
#define	NMBCLUSTERS	((1024 * 1024) / MCLBYTES)	/* cl map size: 1MB */
#else
#define	NMBCLUSTERS	((1024 * 1024) / MCLBYTES)	
		/* cl map size was  0.5MB when MSIZE was 128, now it's 1MB*/
#endif
#endif

/* pages ("clicks") (NBPG bytes) to disk blocks */
#define	ctod(x)	((x)<<(PGSHIFT-DEV_BSHIFT))
#define	dtoc(x)	((x)>>(PGSHIFT-DEV_BSHIFT))
#define	dtob(x)	((x)<<DEV_BSHIFT)

/* pages to bytes */
#define	ctob(x)	((x)<<PGSHIFT)

/* bytes to pages */
#define	btoc(x)	(((unsigned)(x)+(PGOFSET))>>PGSHIFT)
#ifdef __APPLE__
#define  btodb(bytes, devBlockSize)         \
        ((unsigned)(bytes) / devBlockSize)
#define  dbtob(db, devBlockSize)            \
             ((unsigned)(db) * devBlockSize)
#else
#define	btodb(bytes)	 		/* calculates (bytes / DEV_BSIZE) */ \
	((unsigned)(bytes) >> DEV_BSHIFT)
#define	dbtob(db)			/* calculates (db * DEV_BSIZE) */ \
	((unsigned)(db) << DEV_BSHIFT)
#endif

/*
 * Map a ``block device block'' to a file system block.
 * This should be device dependent, and should use the bsize
 * field from the disk label.
 * For now though just use DEV_BSIZE.
 */
#define	bdbtofsb(bn)	((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))

/* from machdep/ppc/proc_reg.h */
#if __BIG_ENDIAN__
#define ENDIAN_MASK(val,size) (1 << (size-1 - val))
#else
#error code not ported to little endian targets yet
#endif /* __BIG_ENDIAN__ */

#ifndef MASK
#define MASK(PART)	ENDIAN_MASK(PART ## _BIT, 32)
#endif

#define	MSR_EE_BIT	16
#define	MSR_PR_BIT	17
#define USERMODE(msr) (msr & MASK(MSR_PR) ? TRUE : FALSE)
#define BASEPRI(msr) (msr & MASK(MSR_EE) ? TRUE : FALSE)
/* end of from proc_reg.h */

#if	defined(KERNEL) || defined(STANDALONE)
#define	DELAY(n) delay(n)
#else
#define	DELAY(n)	{ register int N = (n); while (--N > 0); }
#endif	/* defined(KERNEL) || defined(STANDALONE) */

#define	NPIDS		16	/* maximum number of PIDs per process */
#define	NIOPIDS		8	/* maximum number of IO space PIDs */

#endif	/* _PPC_PARAM_H_ */
Commit	Line	Data
1c79356b	1	/*
9bccf70c	2	* Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
1c79356b A	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/* Copyright (c) 1993,1995 NeXT Computer, Inc. All Rights Reserved */
	23	/*
	24	* The NEXTSTEP Software License Agreement specifies the terms
	25	* and conditions for redistribution.
	26	*
	27	*/
	28
	29	#ifndef _PPC_PARAM_H_
	30	#define _PPC_PARAM_H_
	31
	32	/*
	33	* Round p (pointer or byte index) up to a correctly-aligned value for all
	34	* data types (int, long, ...). The result is u_int and must be cast to
	35	* any desired pointer type.
	36	*/
	37	#define ALIGNBYTES 3
	38	#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
	39
	40	#define NBPG 4096 /* bytes/page */
	41	#define PGOFSET (NBPG-1) /* byte offset into page */
	42	#define PGSHIFT 12 /* LOG2(NBPG) */
	43
	44	#define NBSEG 0x40000000 /* bytes/segment (quadrant) */
	45	#define SEGOFSET (NBSEG-1) /* byte offset into segment */
	46	#define SEGSHIFT 30 /* LOG2(NBSEG) */
	47
	48	#define DEV_BSIZE 512
	49	#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
	50	#define BLKDEV_IOSIZE 2048
	51	#define MAXPHYS (128 * 1024) /* max raw I/O transfer size */
	52
	53	#define STACK_GROWTH_UP 0 /* stack grows to lower addresses */
	54
	55	#define CLSIZE 1
	56	#define CLSIZELOG2 0
	57
	58	#define STACKSIZE 4 /* pages in kernel stack */
9bccf70c	59	#define UPAGES 0 /* total pages in u-area */
1c79356b A	60	/* red zone is beyond this */
	61
	62	/*
	63	* Constants related to network buffer management.
	64	* MCLBYTES must be no larger than CLBYTES (the software page size), and,
	65	* on machines that exchange pages of input or output buffers with mbuf
	66	* clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
	67	* of the hardware page size.
	68	*/
	69	#define MSIZE 256 /* size of an mbuf */
	70	#define MCLBYTES 2048 /* large enough for ether MTU */
	71	#define MCLSHIFT 11
	72	#define MCLOFSET (MCLBYTES - 1)
	73	#ifndef NMBCLUSTERS
	74	#if GATEWAY
	75	#define NMBCLUSTERS ((1024 * 1024) / MCLBYTES) /* cl map size: 1MB */
	76	#else
	77	#define NMBCLUSTERS ((1024 * 1024) / MCLBYTES)
	78	/* cl map size was 0.5MB when MSIZE was 128, now it's 1MB*/
	79	#endif
	80	#endif
	81
	82	/* pages ("clicks") (NBPG bytes) to disk blocks */
	83	#define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT))
	84	#define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT))
	85	#define dtob(x) ((x)<<DEV_BSHIFT)
	86
	87	/* pages to bytes */
	88	#define ctob(x) ((x)<<PGSHIFT)
	89
	90	/* bytes to pages */
	91	#define btoc(x) (((unsigned)(x)+(PGOFSET))>>PGSHIFT)
	92	#ifdef __APPLE__
	93	#define btodb(bytes, devBlockSize) \
	94	((unsigned)(bytes) / devBlockSize)
	95	#define dbtob(db, devBlockSize) \
	96	((unsigned)(db) * devBlockSize)
	97	#else
	98	#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
	99	((unsigned)(bytes) >> DEV_BSHIFT)
	100	#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
	101	((unsigned)(db) << DEV_BSHIFT)
	102	#endif
	103
	104	/*
	105	* Map a ``block device block'' to a file system block.
	106	* This should be device dependent, and should use the bsize
	107	* field from the disk label.
	108	* For now though just use DEV_BSIZE.
	109	*/
	110	#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
	111
	112	/* from machdep/ppc/proc_reg.h */
	113	#if __BIG_ENDIAN__
	114	#define ENDIAN_MASK(val,size) (1 << (size-1 - val))
	115	#else
	116	#error code not ported to little endian targets yet
	117	#endif /* __BIG_ENDIAN__ */
	118
	119	#ifndef MASK
	120	#define MASK(PART) ENDIAN_MASK(PART ## _BIT, 32)
	121	#endif
	122
	123	#define MSR_EE_BIT 16
124	#define MSR_PR_BIT 17
125	#define USERMODE(msr) (msr & MASK(MSR_PR) ? TRUE : FALSE)
126	#define BASEPRI(msr) (msr & MASK(MSR_EE) ? TRUE : FALSE)
127	/* end of from proc_reg.h */
128
129	#if defined(KERNEL) \|\| defined(STANDALONE)
130	#define DELAY(n) delay(n)
131	#else
132	#define DELAY(n) { register int N = (n); while (--N > 0); }
133	#endif /* defined(KERNEL) \|\| defined(STANDALONE) */
134
135	#define NPIDS 16 /* maximum number of PIDs per process */
136	#define NIOPIDS 8 /* maximum number of IO space PIDs */
137
138	#endif /* _PPC_PARAM_H_ */